{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/strongswan/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["strongSwan"],"_cs_severities":["critical"],"_cs_tags":["vpn","denial-of-service","code-execution","strongswan"],"_cs_type":"advisory","_cs_vendors":["strongSwan"],"content_html":"\u003cp\u003eMultiple vulnerabilities in strongSwan allow a remote, anonymous attacker to perform a denial of service or potentially execute arbitrary code. strongSwan is an open-source IPsec-based VPN solution. Given the potential for remote code execution, organizations using strongSwan should investigate and apply the appropriate patches as soon as possible. Successful exploitation could lead to significant disruption of VPN services and potential compromise of systems connected via VPN.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a vulnerable strongSwan instance exposed to the internet.\u003c/li\u003e\n\u003cli\u003eThe attacker sends a crafted network packet to the vulnerable strongSwan instance, triggering a memory corruption vulnerability.\u003c/li\u003e\n\u003cli\u003eThe vulnerability causes a buffer overflow, allowing the attacker to overwrite adjacent memory regions.\u003c/li\u003e\n\u003cli\u003eThe attacker carefully crafts the malicious payload to overwrite critical data structures in memory, such as function pointers.\u003c/li\u003e\n\u003cli\u003eThe attacker triggers the execution of the overwritten function pointer by initiating a specific VPN connection request.\u003c/li\u003e\n\u003cli\u003eThe hijacked function pointer redirects execution to attacker-controlled code.\u003c/li\u003e\n\u003cli\u003eThe attacker\u0026rsquo;s code disables security mechanisms and gains full control of the strongSwan process.\u003c/li\u003e\n\u003cli\u003eThe attacker executes arbitrary commands on the system, pivots to internal networks, or initiates a denial-of-service attack.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation can lead to a denial-of-service condition, disrupting VPN services for remote users and potentially impacting business operations. The potential for arbitrary code execution opens the door to complete system compromise, allowing attackers to steal sensitive data, install malware, or pivot to other systems on the network. The number of affected organizations is unknown, but any organization using a vulnerable version of strongSwan is at risk.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade strongSwan to the latest version to patch the vulnerabilities (refer to the vendor\u0026rsquo;s security advisory).\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rules provided below to your SIEM to detect potential exploitation attempts.\u003c/li\u003e\n\u003cli\u003eMonitor network traffic for suspicious patterns associated with strongSwan, such as malformed packets or unusual connection attempts (log source: network_connection).\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-11T09:03:15Z","date_published":"2026-05-11T09:03:15Z","id":"https://feed.craftedsignal.io/briefs/2026-05-strongswan-rce-dos/","summary":"A remote, anonymous attacker can exploit multiple vulnerabilities in strongSwan to conduct a denial-of-service attack or potentially achieve arbitrary code execution.","title":"Multiple Vulnerabilities in strongSwan Enable Denial of Service and Code Execution","url":"https://feed.craftedsignal.io/briefs/2026-05-strongswan-rce-dos/"}],"language":"en","title":"CraftedSignal Threat Feed — StrongSwan","version":"https://jsonfeed.org/version/1.1"}